Carnea, Herald of Carnage

0: Becomes an X/X Gnoll, where X is her Loyalty until end of your turn. If she fights, gain +1 for each enemy creature destroyed.
-4: Create 2 2/2 red Gnoll tokens with first strike. Gain +1 every time they destroy a creature.
-12: Until your next turn, during the Combat Step, everything that can attack or block must do it. Gain +1 for each creature destroyed.